do_action( 'update_postmeta', int $meta_id, int $object_id, string $meta_key, mixed $meta_value )

Parameters

$meta_id

(int) ID of metadata entry to update.

$object_id

(int) Post ID.

$meta_key

(string) Metadata key.

$meta_value

(mixed) Metadata value. This will be a PHP-serialized string representation of the value if the value is an array, an object, or itself a PHP-serialized string.